/*
 *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree. An additional intellectual property rights grant can be found
 *  in the file PATENTS.  All contributing project authors may
 *  be found in the AUTHORS file in the root of the source tree.
 */

#include "critical_section_wrapper.h"
#include "monitor_module.h"

namespace webrtc  {

namespace voe  {

MonitorModule::MonitorModule() :
_observerPtr(NULL),
  _callbackCritSect(*CriticalSectionWrapper::CreateCriticalSection()),
  _lastProcessTime(GET_TIME_IN_MS()) {
}

MonitorModule::~MonitorModule() {
  delete &_callbackCritSect;
}

WebRtc_Word32 MonitorModule::RegisterObserver(MonitorObserver& observer) {
  CriticalSectionScoped lock(&_callbackCritSect);
  if (_observerPtr) {
    return -1;
  }
  _observerPtr = &observer;
  return 0;
}

WebRtc_Word32 MonitorModule::DeRegisterObserver() {
  CriticalSectionScoped lock(&_callbackCritSect);
  if (!_observerPtr) {
    return 0;
  }
  _observerPtr = NULL;
  return 0;
}

WebRtc_Word32 MonitorModule::Version(char* version,
  WebRtc_UWord32& remainingBufferInBytes,
  WebRtc_UWord32& position) const {
  return 0;
}

WebRtc_Word32 MonitorModule::ChangeUniqueId(const WebRtc_Word32 id) {
  return 0;
}

WebRtc_Word32 MonitorModule::TimeUntilNextProcess() {
  WebRtc_UWord32 now = GET_TIME_IN_MS();
  WebRtc_Word32 timeToNext =
    kAverageProcessUpdateTimeMs - (now - _lastProcessTime);
  return (timeToNext); 
}

WebRtc_Word32 MonitorModule::Process() {
  _lastProcessTime = GET_TIME_IN_MS();
  if (_observerPtr) {
    CriticalSectionScoped lock(&_callbackCritSect);
    _observerPtr->OnPeriodicProcess();
  }
  return 0;
}

}  //  namespace voe

}  //  namespace webrtc
